Hello.
I'm Marcin, I have question about Steam Cd Keys.
I'm form Poland and I have buy a Counter Strike 1.6 CD KEY Steam in internet shoop allegro.pl.
We sells keys to the game Half Life: platinum collection. Here is a list of games that I buy on this auction:
Counter Strike 1.6
Counter-Strike Steamworks BETA
Half-Life
Deatchmatch Classic
Half-Life: Blue Shift
Opposing Force
Ricochet
Team Fortress Classic

That is not an authorized seller. Don't purchase CD-keys over the internet. It's not legit and your account could be disabled. You can purchase a retail copy of the Counter-Strike 1 Anthology from many online retailers such as Amazon if you are unable to purchase from Steam.

That collection will be given to you if you use any half-life, blue-shift or counter-strike key from the original siera packaging and WON system. I doubt any valid and unused keys from that time are still around, and i wouldn't deal with key sellers as you can not confirm their legitimacy. only if you can find an unopened boxed version of the sierra published half-life, blue-shift, or counter-strike, can you get the collection listed in your post by entering it's key.